How would you make a modal dialog accessible and reliable?

Prefer a well-supported native dialog or a thoroughly tested accessible patte . Give it an accessible name, move focus appropriately when opened, keep background content from receiving unintended interaction, and restore focus sensibly when closed. Provide a clear close control and appropriate Escape behavior while considering unsaved work. Test keyboard traversal, screen readers, zoom, and mobile viewports. Declaring a role alone does not implement focus management. Avoid opening a dialog unexpectedly or making critical actions depend on pointer input or visual position alone.